molecular gas towards the north-east (NE) of the W28 supernova remnant (SNR). This cloud is spatially well-matched to the TeV gamma-ray source HESS J1801-233 and is known to be a SNR-molecular cloud interaction region." Fermi sources associated with this object: - 1FGL J1801.3-2322c and 1FGL J1800.5-2359c Source Morphology: This SNR has a mixed ...

2018年5月9日 · Supernova remnant (SNR)\,W28 is well known for its classic hadronic scenario, in which the TeV cosmic rays (CRs) released at the early stage of this mid-aged SNR are illuminating nearby molecular clouds (MCs). Overwhelming evidences have shown that the northeast of the SNR (W28-North) has already encountered with the MC clumps.

W28 is an old-age(>104 years, see [1, 2, 3]) supernovaremnant (SNR), which exhibits non-thermalsynchrotronemis-sion seen in 90cm radio continuum in Figure1. The W28 SNR has been implicated as a cosmic ray (CR) accelerator due to a correspondence between TeV gamma-ray emission and molecular gas at a distance of 1.2-3.3kpc [4, 5, 6, 7].

2004年5月12日 · This is a 3-false color image of the region surrounding the W28 supernova remnant (SNR) that is located in our Galaxy. This image was created to look for new supernova remnants through their non-thermal (synchrotron) radio emission.

2024年5月6日 · Mazumdar et al. revealed the formation of H 2 CO and CH 3 OH in the shocked region of the SNR W28. However, observational study of shock chemistry is still scarce, and further investigations are needed. Meanwhile, SNR shocks are believed to be the prime accelerators of Galactic CRs following the diffuse shock acceleration process (Bell 1978).

2014年7月30日 · We have performed an XMM-Newton imaging and spectroscopic study of supernova remnant (SNR) W28, a prototype mixed-morphology or thermal composite SNR believed to be interacting with a molecular cloud. The observed hot X-ray emitting plasma is characterized by low metal abundances, showing no evidence of ejecta.

1999年11月30日 · The southern supernova remnant (SNR)W28 was observed in 1994 and 1995 by the CANGAROO 3.8m telescope in a search formulti-TeV gamma ray emission, using the Cerenkov imaging technique.

1999年11月30日 · The southern supernova remnant (SNR)W28 was observed in 1994 and 1995 by the CANGAROO 3.8m telescope in a search formulti-TeV gamma ray emission, using the Cerenkov imaging technique.

To investigate the SNR–cloud interaction in the prototype interacting SNR W28 (G6.4−0.1), we present new observations of the HCO + , HCN, and HNC J=1–0 lines, supplemented by archival data of CO isotopes, N

2000年6月2日 · The southern supernova remnant (SNR) W28 was observed in 1994 and 1995 by the CANGAROO 3.8m telescope in a search for multi-TeV gamma ray emission, using the Čerenkov imaging technique. We obtained upper limits for a variety of point-like and extended features within a ±1° region and briefly discuss these results, together with that of EGRET ...